Smokebox for heating apparatus



J y 15, 1952 R. B. DICKSON ETAL 2,603,209 I SMOKEBOX FOR HEATINGAPPARATUS Filed Jan. 5, 1949 2' SHEETS-SHEET 1 INVENTORS July 15, 1952R. B. DICKSON ET'AL 2,603,209

SMOKEBOX FOR HEATING APPARATUS Filed Jan. 5, 1949 2 sHEETS-SHEET 2INVENTORS Patented July 15, 1952 SMOKEBOX son HEATING APPARATUS RobertB. Dickson and Roy H. somers, Kewanee, 111., assignors to Kewanee BoilerCorporation, v-Kewanee, 111., a corporation of Delaware ApplicationJanuary 5, 1949, Serial No; 69,256

A boiler smokebox, as its name indicates, is a box-like steel orcomparable enclosure or housing attached to the boiler proper for thepurpose of collecting or assembling smoke and gases from the boiler, anddirecting them, by means of a suitable sheet-metal or other appropriateconduit or flue, generally referred to as a breeching, to a stack orchimney for the discharge or delivery therefrom to the atmosphere. Suchbreeching may be attached or connected to the smokebox in either ahorizontal or a vertical position depending on the requirements of theparticular installation, and since these demands or needs vary greatlyit becomes of substantial importance that the smokebox have provisionfor readily making either a horizontal or a vertical connectiontherewith without necessity for the use of special tools or particulartraining. t

The present invention efficiently meets suc requirement in that by theinnovatory structure and mode of operation of the smokebox incorporatingthe instant invention, the specified problem was adequately solved.

The new box is relatively simple in construction, is comparativelyinexpensive to build, is unlikely to become damaged or injured inassembling its parts together, is of long life, is reasonably safe frominjury or damage during ordinary service, etc. i

The assembled box is preferably made up of three parts aside from meansfastening such elements or members together.

, One of these members or parts constitutes the bottom and the twoopposite end-walls of the smokebox, another or companion memberconstitutes the top and back of the box, such companion member having anopening therethrugh which receives the third member or part which isflanged and known as a smoke neck. It is to such neck that the breechingis actually applied, such smoke neck being of'such size and shape thatthe flattened end of a stock piece of smoke pipe or breeching willreadily slip over its flange.

In order that those acquainted with this art may readily understand thepresent invention, and its structural and. functional advantages, apresent preferred embodiment of such invention has been illustrated inthe accompanying drawings, forming a part of this specification, anddescribed below in detail whereby any one having a knowledge of this artwill readily appreciate the advantages of its novel structure In suchdrawings: I

Figure 1 presents a perspective view of a boiler whose rear wall has oneof the newsmoke- 9 Claims. (01. 126-307) boxes mounted thereon, thebreechingconnection of such smokebox-to the stack or chimney not beingshown;

Figure 2 illustrates a vertical cross-section through the smokeboxportraying the manner of mounting it on the boiler;

Figure 3 is a vertical section through such box on line 3-3 of Figure 2as viewed inithe direction indicated by the arrows;

Figure 4 is a'fragmentary vertical section of the boiler and through thesmokebox similar to Fig. 2, but with the outlet construction at the topof the box instead of the back thereof;

Figure 5 depicts the sheet-metal member of the smokebox constituting itsinternal bottom and opposite end walls;

Figure 6 portrays the other member of the box comprising its top andback perforated wall;

Figure 7 illustrates the same sheet-metal member as shown in Figure 6presented as used to have the smokebox top as discharging the smoke andgases through it; and

Figure 8 presents in perspective the smokeneck which is to be mounted inthe discharge opening which occupies one of the two walls illustrated.

Referring to Figure 1 of the drawings, the boiler H) has the novelsmokebox l2 embodying the current invention suitably mounted on itsrear-wall II in position to receive through its front the smoke andgases from the interior of the boiler, and to discharge them' from theinterior of the smokebox through the opening in its back-Wall.

The bent, sheet#metal,* integral member or first unit, designated as awhole It, of the smokebox illustrated in Figure 5, by itself alone, ismade from a flat blank and then bent to form a plane rectangular bottomand flat, vertical, substantially square end-walls 14,15, of like sizewith cleanout openings l6, it normally closed by manually removablecovers l1, I! (Figure 3).

The bottom of such first unit is equipped with full length front andrear upstanding flanges I8 and I9, respectively, the front narrow flangel8 having welded thereto three apertured mounting clips 2|, 22, 23,employed to accommodate stud-bolts extending through the holes of suchclips and registering holes in the wall of'the boiler to fasten the boxthereto;

' Each end-wall l'and [5 has three inturned, bevelled-end, integralflanges,'these comprising a back flange 2 with two spaced apertures 21and 28 therethrough', a top flange 2 5 with like separated apertures 29and 3!. and a somewhat narrower unapertured flange 26. The flanges 26,26 and I8 are in the same vertical front plane and flanges 24, 24 and H]are in the same vertical back plane. The other or companion orcomplementary main sheet-metal member or second unit 32 of the smokeboxis of angle form, shown separate from the other parts in Figures 6 and'7, and has an apertured rectangular wall 33 with an oval opening orperforation 34 therethrough of the shape depicted in said Figures 6 and7. In the opening 34 is snugly fitted the third part or member which isthe smokeboxneck designated as a whole 35 (Figure 8) having a neck part36 of the same shape and external size as the opening 34 and having aflange 31 extending from the part 36 and bearing against the inner faceof wall 33 and spot-welded thereto. The neck part 36 projectssufliciently be-- yond the wall 33 for the easy application thereto ofan outlet flue or breeching connection 9, as shown in dotted lines inFigures 2 and 4. The margin of the wall 33 parallel to the angle edgehas an inturned bevelled-end flange 38 fitted with three apertures 39(Figures 2, 6 and 7), whereas each of the two end portions of wall 33and fitted with a pair of apertures 4|, 4|, each pair being spaced apartthe same distance as apertures 21 from 28, and 29 from 3|.

The wall 40 integral with the wall 33 and of the same rectangular sizeas wall 33, and which is at a right-angle to such wall 33, has at eachof its two ends a pair of apertures 42, 42 therethrough, each pair beingspaced apart the same distance as the apertures 21 from 28, and 29 from3|. The longitudinal edge of wall 40 parallel its angle edge has'aninturned flange 43 (Fig. 6) at right-angles to the sheet 40 and providedwith bevelled-ends, such flange having three apertures 44 spaced likethose, 39, of the other flange 38.

Assuming that the smoke and gases are to be delivered horizontally fromthe smokebox, the second unit member 32 (Figure 6) is applied to thefirst unit member I3 (Figure withthe smokebox-neck aperture positionedas shown in Figure 6, and the two parts or members are held together byeight bolts 40a extended through the sixteen apertures 21, 28, 29, 3|,4| and 42 with the flange 38 below the bottom of member I3, as depictedin Figure 2.

When the two elements 32 and I3 are thus fastened together, the smokebox-which previously had the smokebox-neck fastened in place in theaperture 34 is mounted on the back of the boiler by bolts through theapertures of clips 2|, 22 and 23 and through the apertures 44 of flange43, as presented in Figure 2.

Of course, to complete the contruction the breeching is thereafterapplied to the neck 35.

In case the breeching is to be connected vertically to the smokebox thenthe element 32 is joined to the member l3 in a different manner, namely,in the position shown in Fig. 7, with the apertured wall 33 of thesecond unit 32 at the top and with the unapertured wall 40 at the back,and in that case the bolts occupying holes 21 and 28 also occupy thefour holes 42, of wall 40 which is then disposed vertically instead ofhorizontally, and those bolts filling holes 29 and 3| also occupy thefour holes 4|, and the finished appliance in section assumes theappearance portrayed in Figure 4.

Under these circumstances, the apertured clips 2|, 22 and 23 and thethree holes 39 of flange 38 are employed by means of bolts to fasten thesmokebox to the boiler, the smokebox-neck 35 having at any suitable timepreviously been fitted and secured in aperture 34.

Whereas various details of construction have been presented in thedrawings and set forth in the above description, it is to be understoodthat various modifications may be resorted to without departure from theheart and essence of the invention as presented in the following claimsand without the loss or sacrifice of any of its material or substantialbenefits and advantages.

We claim:

1. A sheet-metal smokebox having an open front adapted to be mounted atthe outlet of a heating apparatus combustion chamber to re- Wall withopposite, upright, substantially square,

aligned, end-walls of the same size each with integral, inwardlydirected, marginal, top and back apertured flanges, a second, companion,integral, bent sheet-metal unit with one flat wall perforated for thedischarge of smoke and gases therethrough, said perforated wall being ofsubstantially the same length as said first unit bottom-wall and ofsubstantially the same height as said first unit end walls, a flatsecond wall integral with and folded longitudinally of and at aright-angle to said second unit perforated wall and of substantially thesame dimensions as those of said perforated wall, the opposite edges ofsaid second unit two walls having like apertured flanges bent inwardlyat right-angles to their longitudinal walls, the apertures of saidsecond unit flanges being adapted to accommodate studbolts to fasteneither one of such flanges to the heating apparatus, the opposite endportions of each of the two walls of said second unit being aperturedfor the reception of bolts extended through either one of such two wallsand the apertures of the back or top flanges of the first unit to fastenthem together with the perforated wall being adapted to be at the backof the smokebox or on its top for theproper application of a breechingconnection thereto.

2. The smokebox construction presented in claim 1, in which theperforation of the one wall of the second unit accommodates a smokeboxneck occupying said perforation and having a flange spot-welded to theinner side of the perforated wall of said second unit, and with thesmokebox neck protruding out of said perforation for the application ofa breeching connection therewith for the discharge of the smokebox gasestherefrom.

3. The smokebox construction presented claim 1, including in additionunperforated up claim 1 in which, when the perforated wall ofv thesecond unit is fastened in place on the first unit as the back verticalwall of the box, its

longitudinal flange is located directly below the bottom wall of thefirst unit. a

6. A smokebox consisting of two main ben sheet-metal units fastenedtogether, the first such unit having a bottom wall and two oppositeupstandingv end walls integral therewith,

the second companion sheet-metal unit having two integral walls of thesame size at a rightangle to one another, one of said two walls beingperforated for the discharge of smoke and gases, a smokebox neckoccupying such perforation for the application of a breaching connectionthereto for the discharge of the smoke and gases from the smokebox, andmeans to fasten said second unit with its two walls as the back and topwalls of said first unit.

7. A smokebox comprising complementary members adapted to be fastenedtogether, one of said members having a bottom wall and end walls atsubstantially right angles to said bottom wall, the other of saidmembers having at least two walls at right angles to each other toprovide side and top walls, means securing said members to each other toform a chamber, one of said two walls having an aperture therethroughfor discharge of gases from said chamher, and said other of said membersbeing so constructed that either of said two walls can be positioned toform the chamber top wall.

8. A smokebox comprising complementary members adapted to be fastenedtogether, said members having walls extending at substantially rightangles to each other to form a chamber, one of said members having atleast two of said walls, one of said two walls having an aperturetherethrough for the discharge of combustion gases, said one of saidmembers being so constructed that either one of said two walls can bepositioned to form the chamber top wall and the other a chamber sidewall, a neck member either one of said two walls can be positioned toform the chamber top wall andthe other a chamber side wall, one of saidtwo walls having an aperture therethrough for the discharge ofcombustion gases, and means rigidly securing said members together.

ROBERT B. DICKSON. ROY H. SOMERS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 407,707 Utter July 23, 18891,179,995 Beckwith Apr. 18, 1916 1,209,043 Scherer Dec. 29, 19161,390,309 Perrow Sept. 13, 1921 1,509,517 Marr et al Sept. 23, 19242,180,212 Morrow Nov. 14, 1939

